5 Volt, Byte Alterable E2PROM The X28HC256PM-90 is a high-speed CMOS EEPROM manufactured by XICOR. Below are its specifications, descriptions, and features based on Ic-phoenix technical data files:
### **Specifications:**
- **Part Number:** X28HC256PM-90
- **Manufacturer:** XICOR
- **Memory Type:** EEPROM (Electrically Erasable Programmable Read-Only Memory)
- **Density:** 256Kbit (32K x 8)
- **Access Time:** 90ns
- **Supply Voltage:** 5V ±10%
- **Operating Temperature Range:** Commercial (0°C to +70°C) or Industrial (-40°C to +85°C)
- **Package:** 28-pin PDIP (Plastic Dual In-line Package)
- **Write Cycle Endurance:** 100,000 cycles per byte
- **Data Retention:** 100 years
### **Descriptions:**
- The X28HC256PM-90 is a high-performance, byte-erasable EEPROM with a fast access time of 90ns.
- It features a simple, byte-alterable memory architecture, allowing individual bytes to be erased and reprogrammed without requiring a full chip erase.
- Designed for high-speed microprocessor applications, it supports both read and write operations with minimal wait states.
### **Features:**
- **High-Speed Performance:** 90ns access time for fast read operations.
- **Low Power Consumption:** CMOS technology ensures low standby and active power usage.
- **Byte Alterability:** Supports in-system byte-level erase and programming.
- **Hardware & Software Protection:** Includes write protection features to prevent accidental data corruption.
- **Automatic Write Cycle Timing:** Internal control circuitry manages write timing, eliminating the need for external timing components.
- **Industry-Standard Pinout:** Compatible with other 256Kbit EEPROMs for easy replacement.
This information is strictly factual, sourced from the manufacturer's datasheet.
